• Heavy Duty Anti-Burst Rating: Our SPORTSCO brand gym ball is manufactured using gym quality standards. When used properly, it can carry the stress of heavy loads up to 150kg without popping to prevent you from being injured. Excess loads above this weight will cause the ball to deflate slowly to ensure your safety.
  
  
• Thick PVC Material Provides Optimum Puncture Resistance: Packed with non-toxic PVC material, our gym balls delivers a greater degree of resistance to objects on the floor or on your clothing that may come in contact with the ball.
  
  
• Non-Slip Ribbed Body Stays Put with Skin Contact: The PVC body has a matte surface with horizontal ribs contoured all around it, making it easy to hold without slipping while tossing, bouncing or squeezing the ball even with profuse sweat.
  
  
• 4 Size Options for Your Comfort and Safety: 55cm, 65cm, 75cm, 85cm. Whether it is for exercise or desk chair, we have all the sizes that suits different users. We have a guide for you below to select the ball.
  
  
• 150-160 cm user height: choose 55cm
• 160-170 cm user height: choose 65cm
• 170-180 cm user height: choose 75cm
• 180 cm and above: choose 85cm
• For desk chair and standard desk height, please choose 75cm or 85cm size.
  
  
• Multiple Color Selections
  
  
• Perfect for Home Use, Gym Use, Desk Chair or as a Gift
  
  
• Pumping Advisory: Anti-Burst Gym Ball has a thicker rubber material. It is normal that it gets harder to pump when the ball expand nearing its maximum size, but you should continue pumping until it reaches its maximum size.
  
  To pump the ball to its maximum size, you may want to place the ball in between a wall and a chair/stool. The distance between the wall and the chair/stool is the ball diameter, once the ball touches the wall and the chair/stool, you can stop pumping.
  
  Alternatively, if you do not want to put much effort in pumping and pumping so hard, you can choose 1 size bigger and do not need to pump it to its maximum.